    <form action="./discovery.php" method="POST">
    <table>
    <tr><td>OpenID URL to discover: </td><td><input type="text" name="identifier" value="<?php echo $identifier?>"></td></tr>
    <tr><td>Skip Cache?</td><td><input type="checkbox" name="skipcache" <?php if ($skipcache) echo ' checked'?>"></td></tr>
    </table>
    <input type="submit" name="start" value="submit">
    </form>
